New repo checklist 🎉

[justinchuby]

• Must be owned and managed by one of the ONNX SIGs or the Steering Committee
• Must be actively maintained
• Must adopt the ONNX Code of Conduct
• Must adopt the standard ONNX license(s) [All code projects use the Apache 2.0 license.
• Documentation repositories must use the Creative Commons License version 4.0.]
• Must adopt the ONNX DCO bot
• Must adopt all ONNX automation (like static code analysis)
• Must have CI or other automation in place for repos containing code to ensure quality
• All OWNERS must be members of standing as defined by ability to vote in Steering Committee elections.

cc @onnx/sig-optimizations-approvers